Thilo Pfennig and Morten Welinder discovered that the XLS spreadsheet handling code in Gnumeric did not correctly calculate needed memory sizes. If a user or automated system were tricked into loading a specially crafted XLS document, a remote attacker could execute arbitrary code with user privileges.
The problem can be corrected by updating your system to the following package versions:
22 April 2008
A security issue affects these releases of Ubuntu and its derivatives:
Thilo Pfennig and Morten Welinder discovered that the XLS spreadsheet handling code in Gnumeric did not correctly calculate needed memory sizes. If a user or automated system were tricked into loading a specially crafted XLS document, a remote attacker could execute arbitrary code with user privileges.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart gnumeric to effect the necessary changes.
Vulmon